/* The following shows the creation of a facet for the output of
* dates in German (please forgive me for any errors in my German --
* I'm not a native speaker).
*/
#include "boost/date_time/gregorian/gregorian.hpp"
#include <iostream>
#include <algorithm>
/* Define a series of char arrays for short and long name strings
* to be associated with German date output (US names will be
* retrieved from the locale). */
const char* const de_short_month_names[] =
{
	"Jan", "Feb", "Mar", "Apr", "Mai", "Jun",
	"Jul", "Aug", "Sep", "Okt", "Nov", "Dez", "NAM"
};
const char* const de_long_month_names[] =
{
"Januar", "Februar", "Marz", "April", "Mai",
"Juni", "Juli", "August", "September", "Oktober",
"November", "Dezember", "NichtDerMonat"
};
const char* const de_long_month_namess[] =
{
	"January", "February", "March", "April", "May",
	"June", "July", "August", "September", "October",
	"November", "December"
};
const char* const de_long_weekday_names[] =
{
	"Sonntag", "Montag", "Dienstag", "Mittwoch",
	"Donnerstag", "Freitag", "Samstag"
};
const char* const de_short_weekday_names[] =
{
	"Son", "Mon", "Die","Mit", "Don", "Fre", "Sam"
};
int main()
{
	using namespace boost::gregorian;
// create some gregorian objects to output
	date d1(2002, Oct, 1);
	greg_month m = d1.month();
	greg_weekday wd = d1.day_of_week();
// create a facet and a locale for German dates
	date_facet* german_facet = new date_facet();
	std::cout.imbue(std::locale(std::locale::classic(), german_facet));
// create the German name collections
	date_facet::input_collection_type short_months, long_months,
	short_weekdays, long_weekdays;
	std::copy(&de_short_month_names[0], &de_short_month_names[11],
		std::back_inserter(short_months));
	std::copy(&de_long_month_names[0], &de_long_month_names[11],
		std::back_inserter(long_months));
	std::copy(&de_short_weekday_names[0], &de_short_weekday_names[6],
		std::back_inserter(short_weekdays));
	std::copy(&de_long_weekday_names[0], &de_long_weekday_names[6],
		std::back_inserter(long_weekdays));
// replace the default names with ours
// NOTE: date_generators and special_values were not replaced as
// they are not used in this example
	german_facet->short_month_names(short_months);
	german_facet->long_month_names(long_months);
	german_facet->short_weekday_names(short_weekdays);
	german_facet->long_weekday_names(long_weekdays);
// output the date in German using short month names
	german_facet->format("%d.%m.%Y");
std::cout << d1 << std::endl; //01.10.2002
german_facet->month_format("%B");
std::cout << m << std::endl; //Oktober
german_facet->weekday_format("%A");
std::cout << wd << std::endl; //Dienstag
// Output the same gregorian objects using US names
date_facet* us_facet = new date_facet();
std::cout.imbue(std::locale(std::locale::classic(), us_facet));
us_facet->format("%m/%d/%Y");
std::cout << d1 << std::endl; // 10/01/2002
// English names, iso order (year-month-day), '-' separator
us_facet->format("%Y-%b-%d");
std::cout << d1 << std::endl; // 2002-Oct-01
return 0;
}
